Cooled piston for internal combustion engines

Abstract

The invention relates to a piston for internal combustion engines whose piston head presents an annular cooling channel which on its end open towards the piston shaft is closed off by an appropriately shaped wall element which is radially divided in at least one place. The aim of the invention is to improve heat dissipation in such a piston. To this end the periphery of the wall element is provided with several radially arranged, evenly distributed transverse walls which extend axially into the cooling channel.

What is claimed is:  
     
       1. A cooled piston for internal combustion engines comprising a cooling channel extending all around in the piston crown, whereby the cooling channel is closed at its end that is open toward the piston shaft, by a correspondingly shaped wall element, said wall element being secured on the piston and being radially divided at least once, wherein the wall element is provided with a plurality of radially arranged transverse walls distributed over its periphery and axially extending into the cooling channel and with part pieces bent off upwards in an inclined manner and disengaged from the wall element, each of said pieces extending in an approximately S-shaped form. 
     
     
       2. The cooled piston according to  claim 1 , wherein the transverse walls form one piece with the wall element. 
     
     
       3. The cooled piston according to  claim 1 , wherein the transverse walls are produced by reshaping a wall element comprising a metal sheet, which is planar in its original state. 
     
     
       4. A cooled piston for internal combustion engines comprising a cooling channel extending all around in the piston crown, whereby the cooling channel is closed at its end that is open toward the piston shaft, by a correspondingly shaped wall element, said wall element being secured on the piston and being radially divided at least once, wherein the wall element is provided with a plurality of radially arranged transverse walls distributed over its periphery and axially extending into the cooling channel and a deepening is molded in the direction of the piston shaft in a planar area between two transverse walls.